lx_nor_flash_close.c
| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /*************************************************************************** | ||
| 2 | * Copyright (c) 2024 Microsoft Corporation | ||
| 3 | * Copyright (c) 2026-present Eclipse ThreadX contributors | ||
| 4 | * | ||
| 5 | * This program and the accompanying materials are made available under the | ||
| 6 | * terms of the MIT License which is available at | ||
| 7 | * https://opensource.org/licenses/MIT. | ||
| 8 | * | ||
| 9 | * SPDX-License-Identifier: MIT | ||
| 10 | **************************************************************************/ | ||
| 11 | |||
| 12 | |||
| 13 | /**************************************************************************/ | ||
| 14 | /**************************************************************************/ | ||
| 15 | /** */ | ||
| 16 | /** LevelX Component */ | ||
| 17 | /** */ | ||
| 18 | /** NOR Flash */ | ||
| 19 | /** */ | ||
| 20 | /**************************************************************************/ | ||
| 21 | /**************************************************************************/ | ||
| 22 | |||
| 23 | #define LX_SOURCE_CODE | ||
| 24 | |||
| 25 | |||
| 26 | /* Disable ThreadX error checking. */ | ||
| 27 | |||
| 28 | #ifndef LX_DISABLE_ERROR_CHECKING | ||
| 29 | #define LX_DISABLE_ERROR_CHECKING | ||
| 30 | #endif | ||
| 31 | |||
| 32 | |||
| 33 | /* Include necessary system files. */ | ||
| 34 | |||
| 35 | #include "lx_api.h" | ||
| 36 | |||
| 37 | |||
| 38 | /**************************************************************************/ | ||
| 39 | /* */ | ||
| 40 | /* FUNCTION RELEASE */ | ||
| 41 | /* */ | ||
| 42 | /* _lx_nor_flash_close PORTABLE C */ | ||
| 43 | /* 6.1.7 */ | ||
| 44 | /* AUTHOR */ | ||
| 45 | /* */ | ||
| 46 | /* William E. Lamie, Microsoft Corporation */ | ||
| 47 | /* */ | ||
| 48 | /* DESCRIPTION */ | ||
| 49 | /* */ | ||
| 50 | /* This function closes a NOR flash instance. */ | ||
| 51 | /* */ | ||
| 52 | /* INPUT */ | ||
| 53 | /* */ | ||
| 54 | /* nor_flash NOR flash instance */ | ||
| 55 | /* */ | ||
| 56 | /* OUTPUT */ | ||
| 57 | /* */ | ||
| 58 | /* return status */ | ||
| 59 | /* */ | ||
| 60 | /* CALLS */ | ||
| 61 | /* */ | ||
| 62 | /* tx_mutex_delete Delete thread-safe mutex */ | ||
| 63 | /* */ | ||
| 64 | /* CALLED BY */ | ||
| 65 | /* */ | ||
| 66 | /* Application Code */ | ||
| 67 | /* */ | ||
| 68 | /**************************************************************************/ | ||
| 69 | 180 | UINT _lx_nor_flash_close(LX_NOR_FLASH *nor_flash) | |
| 70 | { | ||
| 71 | |||
| 72 | LX_INTERRUPT_SAVE_AREA | ||
| 73 | |||
| 74 | |||
| 75 | /* Lockout interrupts for NOR flash close. */ | ||
| 76 | 126 | LX_DISABLE | |
| 77 | |||
| 78 | /* See if the media is the only one on the media opened list. */ | ||
| 79 |
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180 | if ((_lx_nor_flash_opened_ptr == nor_flash) && |
| 80 |
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180 | (_lx_nor_flash_opened_ptr == nor_flash -> lx_nor_flash_open_next) && |
| 81 |
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180 | (_lx_nor_flash_opened_ptr == nor_flash -> lx_nor_flash_open_previous)) |
| 82 | { | ||
| 83 | |||
| 84 | /* Only opened NOR flash, just set the opened list to NULL. */ | ||
| 85 | 180 | _lx_nor_flash_opened_ptr = LX_NULL; | |
| 86 | } | ||
| 87 | else | ||
| 88 | { | ||
| 89 | |||
| 90 | /* Otherwise, not the only opened NOR flash, link-up the neighbors. */ | ||
| 91 | ✗ | (nor_flash -> lx_nor_flash_open_next) -> lx_nor_flash_open_previous = | |
| 92 | ✗ | nor_flash -> lx_nor_flash_open_previous; | |
| 93 | ✗ | (nor_flash -> lx_nor_flash_open_previous) -> lx_nor_flash_open_next = | |
| 94 | ✗ | nor_flash -> lx_nor_flash_open_next; | |
| 95 | |||
| 96 | /* See if we have to update the opened list head pointer. */ | ||
| 97 | ✗ | if (_lx_nor_flash_opened_ptr == nor_flash) | |
| 98 | { | ||
| 99 | |||
| 100 | /* Yes, move the head pointer to the next opened NOR flash. */ | ||
| 101 | ✗ | _lx_nor_flash_opened_ptr = nor_flash -> lx_nor_flash_open_next; | |
| 102 | } | ||
| 103 | } | ||
| 104 | |||
| 105 | /* Decrement the opened NOR flash counter. */ | ||
| 106 | 180 | _lx_nor_flash_opened_count--; | |
| 107 | |||
| 108 | /* Finally, indicate that this NOR flash is closed. */ | ||
| 109 | 180 | nor_flash -> lx_nor_flash_state = LX_NOR_FLASH_CLOSED; | |
| 110 | |||
| 111 | /* Restore interrupt posture. */ | ||
| 112 | 126 | LX_RESTORE | |
| 113 | |||
| 114 | #ifdef LX_THREAD_SAFE_ENABLE | ||
| 115 | |||
| 116 | /* Delete the thread safe mutex. */ | ||
| 117 | 18 | tx_mutex_delete(&nor_flash -> lx_nor_flash_mutex); | |
| 118 | #endif | ||
| 119 | /* Return success. */ | ||
| 120 | 180 | return(LX_SUCCESS); | |
| 121 | } | ||
| 122 | |||
| 123 | |||
| 124 |